Teragray is 1000000000000 gray units.
Teragrays to Exagrays Converter — TGy to EGy
Convert Teragray (TGy) to Exagray (EGy) using the exact conversion factor (1 teragray = 0.000001 exagray). See the formula, worked examples, and conversion table.
Teragrays to Exagrays converter
Converter
Radiation Converter
Convert radioactivity, absorbed dose, and equivalent dose units by compatible radiation family.
Context values
Some unit families need one extra value for a physically accurate result.
Exagray is 1000000000000000000 gray units.
Result = input x 1e+12 / 1e+18.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Teragrays to Exagrays
Teragray and Exagray both belong to the radiation-measurement family, though radiation quantities fall into genuinely distinct categories: absorbed dose (gray, rad) measures energy deposited in matter, equivalent dose (sievert, rem) weights that for biological harm, and activity (becquerel, curie) measures how often a radioactive source decays — this page only converts between units of the same kind. Specifically: Teragray is 1000000000000 gray units, and exagray is 1000000000000000000 gray units.
Formula
exagrays = teragrays × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 teragray equals 1e+12 base units, and 1 exagray equals 1e+18 base units, so dividing one by the other gives the direct teragray-to-exagray factor of 0.000001.
Simple example
1 TGy × 0.000001 = 0.000001 EGy
1 teragray = 0.000001 exagrays.
Real-world example
10 TGy × 0.000001 = 0.00001 EGy
10 teragrays = 0.00001 exagrays.
Conversion table
| Teragray (TGy) | Exagray (EGy) |
|---|---|
| 0.001 TGy | 1e-9 EGy |
| 0.01 TGy | 1e-8 EGy |
| 0.1 TGy | 1e-7 EGy |
| 1 TGy | 0.000001 EGy |
| 10 TGy | 0.00001 EGy |
| 100 TGy | 0.0001 EGy |
Reverse conversion: Exagray to Teragray
0.000001 EGy × 1000000 = 1 TGy
0.000001 exagrays = 1 teragray.
teragrays = exagrays × 1000000
For a page dedicated to this direction, see Exagray to Teragray.
Understanding the Teragray (TGy)
Teragray is 1000000000000 gray units.
Understanding the Exagray (EGy)
Exagray is 1000000000000000000 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many exagrays are in 1 teragray?
1 teragray equals 0.000001 exagrays, using the exact defined conversion factor rather than an estimate.
How do I convert teragray to exagray?
Multiply the teragray value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert exagray back to teragray?
Use the reverse factor: 1 exagray equals 1,000,000 teragrays. You can also use the swap control in the converter above to flip the direction instantly.
What is a teragray?
Teragray (TGy) is a unit of radiation.
What is a exagray?
Exagray (EGy) is a unit of radiation.
Is the teragray to exagray conversion exact?
Yes. Both teragray and exagray are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 used above is exact to as many digits as you choose to display.
What's the difference between absorbed dose, equivalent dose, and activity?
Absorbed dose (gray, rad) measures the energy radiation deposits in matter. Equivalent dose (sievert, rem) adjusts that figure for how harmful different types of radiation are to biological tissue. Activity (becquerel, curie) measures how often a radioactive source decays, independent of how much dose a person actually receives from it.